US1367326A

US1367326A - Governor-actuated valve

Info

Publication number: US1367326A
Application number: US354965A
Authority: US
Inventors: Rackham George John
Original assignee: Individual
Current assignee: Individual
Priority date: 1920-01-29
Filing date: 1920-01-29
Publication date: 1921-02-01
Anticipated expiration: 1938-02-01

Description

G. J. RACKHAM- GOVERNOR ACTUYATED VALVE. APPLICATION FILED JAN. 29, 1920 Patented Feb. 1, 1921.

' hr 0' WET-we GEORGE JOHN RAGKI-IAM, or rU'rNEY, LONDON, ENGLAND.

GOVERNOR-ACTUATED VALVE.

Specification of Letters Patent.

Patented Feb. 1, 1921.

Application filed January 29, 1920. Serial No. 354,965.

Needle valves as used in carburetors are of small diameter and very fine taper and with continued working of the needle on its seat excessive wear takes place. Now it is one object of the present invention to prevent this excessive wear of the needle or its seating and we accomplish this by employing means which limit the closing movement of the needle. 1

This invention comprises broadly a gov ernor valve provided with means for limiting its motion so that in the closed position it never el'lgages in seating under pressure. 111 a nothcr aspect this invention may be stated to :onsist of a spring biased or balanced needle valve adapted to throttle down or cut oil' the supply without pressure contact on its seating. Further features will be described in connection with the accompanying drawing.

The drawin illustrates the aresent invenmuch of an ention partly in section and so for nnderstan dgine cylinder as is necessary ing same.

In the drawing 1 designates the inner wall of an engine cylinder, 2 the water jacket, 3 the outer wall and 4 the body of a carbureter integral therewith or secured thereto. Below the jet 5 is a chamber 6 communicating with the float chamber 7 by a duct 8 the up per end of which is provided with a seating for the needle 9.

As pointed out above continued operation of the needle causes excessive Wear when it is seated under pressure.

To eliminate such pressure the needle is provided with an enlarged body portion which passes through a tube 10 to a point outside the carburetor body or casing. The needle is normally urged into the full open position by a spring 11 engaging the flange or head 12 of the needle.

Between the tube 10 and the spring 11 is a distance piece or sleeve 13 the height of which is such that it arrests the movement of the needle downwardly just when it makes bare contact with the seating that is to say before pressure can force it hard on to the seating.

The height of distance piece 13 can be determined so that the needle never actually touches its seating yet will throttle down the fuel sufficiently to either stop the engine or just keep it slowly turning over.

To prevent air escaping from the float chamber in cases where that chamber contains air under pressure the bottom of tube 10 is located below the level of the fuel in the carburetor. Moreover the bod of the needle within the tube may be provided with a series of annular grooves as shown to form liquid seals to prevent air escaping.

The valve rocker 14: carried bythe pin or shaft 15 mounted in the lug or lugs 16 has an arm 17-shown dotted-engaging by means of a forked end with the control rod 18 which moves back and forth along its axis in response to variationsin engine speed. This rod 18 is screw threaded and is embraced by a spring-19 engaging at one end a nut or collar. 20 and at the other end the fork on arm 17.

The wing nut 22 serves for adjusting the valve as will be readily understood. The motion of the rod 18 is controlled in any of the well known ways in which governor rods are controlled.

Various modifications may be made in the construction, that shown being by way of example only.

I claim.

1. Valve mechanism, comprising in combination a valve needle, a seating therefor. a guide for said valve needle, a rocker en gaging said valve needle, a reciprocatable rod responsive to variations on engine speed engaging said rocker whereby the rocker and valve needle are actuated, a head on said valve needle, a spring normally urging the valve away from its seating and a stop engaging said head to limit the closing movement of said valve needle.

2. Valve mechanism comprising in combination a valve needle, a seating therefor, a guide for said valve needle, a rocker engaging said valve needle, a reciprocatable rod responsive to variations in engine speed engaging said rocker whereby the rocker and valve needle are actuated, a head on said valve needle, a spring normally urging the valve away from its seating, a stop serving to limit the closing movement of said valve needle and means on said reciprocatable rod for adjusting said valve needle.

3. Valve mechanism comprising in com bination a valve needle, a seating therefor, a guide for said valve needle, a rocker engaging said valve needle, a reeiproeatable rod responsive to variations in engine speed engaging said rocker Whereb T the rocker and valve needle are actuated, a head on said valve needle, a spring normally urging the valve away from its seating, a stop serving to limit the closing movement of said valve needle a collar on said reciprocatable rod, a spring interposed between said collar and a forked'arm on the rocker and an adjustable nut on said rod engaging said forked arm to adjust the valve needle.

governor actuated carbureter valve comprising in combination a carbureter bod a fioat chamber therein adapted to contain fuel and gas under pressure, a valve needle a guide tube therefor terminating below the level of the fuel, liquid seals formed between said needle and guide tube, a distance'piece outside the carbureter body and surrounding said guide tube, a head on the valve needle, a spring surrounding said distance piece and interposed between the carburetor body and said needle head, a valve rocker an arm on said rocker engaging said needle, a second arm on said rocker forked at its free end, a control rod the movements of Which are responsive to variations in engine speed, means for operatively connecting said control rod to the forked arm of the rocker and means for adjusting the anguneedle, a guide tube for said lar position of said rocker and the movement of the needle valve.

5. Governor actuated valve mechanism comprising in combination a fluid reservoir,

a valve seating therein, a valve needle, :1 guide therefor, a valve rocker, a control rod operatively connected to said rocker and responsive to variations in engine speed, a stop limiting the closing movement of said needle, a spring normally urging said needle awn from the seating, liquid seals embraeing the needle Within said guide and means for ad justing the angular position of the rocker at a predetermined speed.

6. A governor actuated valve for earbureters comprising in combination a Iluid reservoir, a valve seating therein, a valve needle, a guide tube for said needle, a spring normally tending to open the valve. a governor controlled rocker operable to (lose the valve and a stop limiting the closing movement of the needle to prevent pressure eontact on its seating.

7. A governor actuated valve for can bureters comprising in combination a fluid reservoir. a valve seating therein, a valve needle a spring normally tending to open the valve. a governor controlled rocker operable to close the valve a stop limiting the elcsing movement of the needle to bare contact with its seating. liquid seals in said guide tube. and means ior adjusting the angular position of the rocker on its pin.

Signed at London this 12th day oi" .lauuary, 1920.

GEORGE JOHN RACKIIA M.

In the presence of- Lois BnA'rnIon CUASTEAYNl-JUF, THOMAS E. Ronnn'rsoN.

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